• Title/Summary/Keyword: depth accuracy

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Integrated Geospatial Information Construction of Ocean and Terrain Using Multibeam Echo Sounder Data and Airborne Lidar Data (항공 Lidar와 멀티빔 음향측심 자료를 이용한 해상과 육상의 통합 지형공간정보 구축)

  • Lee, Jae-One;Choi, Hye-Won;Yun, Bu-Yeol;Park, Chi-Young
    • Journal of the Korean Association of Geographic Information Studies
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    • v.17 no.4
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    • pp.28-39
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    • 2014
  • Several studies have been performed globally on the construction of integrated systems that are available for the integrated use of 3D geographic information on terrain and oceans. Research on 3D geographic modeling is also facilitated by the application of Lidar surveying, which enables the highly accurate realization of 3D geographic information for a wide area of land. In addition, a few marine research organizations have been conducting investigations and surveying diverse ocean information for building and applying MGIS(Marine Geographic Information System). However, the construction of integrated geographic information systems for both terrain and oceans has certain limitations resulting from the inconsistency in reference systems and datum levels between two data. Therefore, in this investigation, integrated geospatial information has been realized by using a combined topographical map, after matching the reference systems and datum levels by integration of airborne Lidar data and multi-beam echo sounder data. To verify the accuracy of the integrated geospatial information data, ten randomly selected samples from study areas were selected and analyzed. The results show that the 10 analyzed data samples have an RMSE of 0.46m, which meets the IHO standard(0.5m) for depth accuracy of hydrographic surveys.